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de4f6e5b41
The header files in the asm-xtensa directory are not clean and 'make headers_check' fails. This is a first patch to fix most of the header files. It removes unnecessary include statements and adds some that are required for building the kernel. The linker script required some updates or the linking stage would fail. Signed-off-by: Chris Zankel <chris@zankel.net>
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/*
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* linux/include/asm-xtensa/page.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version2 as
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* published by the Free Software Foundation.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_PAGE_H
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#define _XTENSA_PAGE_H
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#ifdef __KERNEL__
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#include <asm/processor.h>
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#define XCHAL_KSEG_CACHED_VADDR 0xd0000000
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#define XCHAL_KSEG_BYPASS_VADDR 0xd8000000
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#define XCHAL_KSEG_PADDR 0x00000000
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#define XCHAL_KSEG_SIZE 0x08000000
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/*
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* PAGE_SHIFT determines the page size
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* PAGE_ALIGN(x) aligns the pointer to the (next) page boundary
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*/
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (1 << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE - 1) & PAGE_MASK)
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#define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR
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#define MAX_MEM_PFN XCHAL_KSEG_SIZE
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#define PGTABLE_START 0x80000000
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#ifdef __ASSEMBLY__
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#define __pgprot(x) (x)
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#else
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct { unsigned long pte; } pte_t; /* page table entry */
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typedef struct { unsigned long pgd; } pgd_t; /* PGD table entry */
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define pte_val(x) ((x).pte)
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) } )
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#define __pgd(x) ((pgd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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/*
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* Pure 2^n version of get_order
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*/
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static inline int get_order(unsigned long size)
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{
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int order;
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#ifndef XCHAL_HAVE_NSU
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unsigned long x1, x2, x4, x8, x16;
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size = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
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x1 = size & 0xAAAAAAAA;
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x2 = size & 0xCCCCCCCC;
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x4 = size & 0xF0F0F0F0;
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x8 = size & 0xFF00FF00;
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x16 = size & 0xFFFF0000;
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order = x2 ? 2 : 0;
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order += (x16 != 0) * 16;
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order += (x8 != 0) * 8;
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order += (x4 != 0) * 4;
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order += (x1 != 0);
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return order;
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#else
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size = (size - 1) >> PAGE_SHIFT;
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asm ("nsau %0, %1" : "=r" (order) : "r" (size));
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return 32 - order;
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#endif
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}
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struct page;
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extern void clear_page(void *page);
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extern void copy_page(void *to, void *from);
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/*
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* If we have cache aliasing and writeback caches, we might have to do
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* some extra work
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*/
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#if (DCACHE_WAY_SIZE > PAGE_SIZE)
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void clear_user_page(void *addr, unsigned long vaddr, struct page* page);
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void copy_user_page(void *to,void* from,unsigned long vaddr,struct page* page);
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#else
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# define clear_user_page(page,vaddr,pg) clear_page(page)
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# define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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#endif
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/*
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* This handles the memory map. We handle pages at
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* XCHAL_KSEG_CACHED_VADDR for kernels with 32 bit address space.
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* These macros are for conversion of kernel address, not user
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* addresses.
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*/
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#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
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#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
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#define pfn_valid(pfn) ((unsigned long)pfn < max_mapnr)
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#ifdef CONFIG_DISCONTIGMEM
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# error CONFIG_DISCONTIGMEM not supported
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#endif
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#define WANT_PAGE_VIRTUAL
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#endif /* __ASSEMBLY__ */
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/memory_model.h>
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#endif /* __KERNEL__ */
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#endif /* _XTENSA_PAGE_H */
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